Ski with antislip means



July l, 1941. E. MlEsEN SKI WITH ANTISLIP MEANS Filed May l5, 1939 3 Sheets-Sheet 1 //////////////////////V////Mw//MWV/vV/v/v//Vf July 1, 1941. E MIESEN 2,248,008

SKI WITH ANTISLIP MEANS Filed May 15, 1959 s sheets-sheet 2 July 1 1941- E. Mil-:SEN 2,248,008

SKI WITH ANTISLIP MEANS Filed May 15, 1939 3 Sheets-Sheet 3 Patented July 1, 1941 SKI WITH ANTIs'LIP MEANS Erich Miesen, Berlin-Charlottenburg, Germany Application May 15, 1939, Serial No. 273,789 In Germany May 19, 1938 (Cl. 28o-11.13)

13 Claims.

My invention relates to skis and more particularly to skis with anti-slip means.

Anti-slip means for skis comprising a brake member or members projecting from the lower surface of the ski have already been proposed, but such means are not satisfactory. The brake members either were too weak, f. i. they consisted of bristles, hooks or the like, or, if of greater strength, involved the draw-back that snow and ice penetrated into the apertures the members are sliding in, obstructing or preventing altogether the shifting of the brake members.

It is an object of my invention to provide improved anti-slip means. To this end I arrange a block as the brake member which is mounted to slide in an aperture in the ski transversely to the lower surface of the ski and makes a tight fit in such aperture, in combination with manual means for reciprocating the block in its aperture.

Preferably the manual means for reciprocating the block is so designed that the lower surface of the block is flush with the lower surface of the ski in its retracted position.

AI may provide more than one block in combination with a mechanism which is operatively l connected to the manual means, so that the blocks are reciprocated in unison.

In the accompanying drawings, by way of example, a ski in which the aforesaid mechanism comprises wedge-shaped members for reciproeating the block, is illustrated in Figs. 1-8 and a ski in which the aforesaid mechanism comprises a system of racks and pinions is illustrated in Figs. 9-11.

More particularly Figs. 1 and 2 are longitudinal central sections illustrating a ski of the rst mentioned type with its block, or one of its blocks, in retracted and in active position respectively.

Fig. 3 is a plan View of the ski illustrated in Figs. 1 and 2 with its top plate partly broken away to expose the wedge members for recipro' eating the block and one ofthe members partly broken away to expose the block which is below this member, the position of parts illustrated in Fig. 3 corresponding to that in Fig. 2.

Fig. 4 is a plan view of a complete ski showing the several plates or layers it is made of. Fig. 5 is a section on the line 5--5 in Fig. 4. Fig. 6 is a section on the line 6 6 in Fig. 4. Fig. 7 is a section on the line 1-1 in Fig. 4. Fig. 8 is a section on the line 8-8 in Fig. 4. Fig. 9 is a fragmentary plan View illustrating the ski of the second type referred to with a rack and pinion mechanism, the top plate of the runner I is made concave in its central portion,` as best seen in Fig. 7, and curved portions con-v nect the concave portion to the sides of the runner where it has its original thickness. By these means lateral projections or skids are formed along the sides of the runner by which the keeping of the track is facilitated.

A pair of strips or spacing members 3 extend for a. certain portion of the total length of the ski, and secured to the spacing members @byV rivets 4 is a top plate 2 as best seen in Fig. 5. The front end of the top plate 2,which, as shown in Fig.Y 4, is pointed, is positioned at some distance Vbehind the, also pointed, front end of the runner I, and its rear end which is square, eX

tends as far as the rear end of the runner.l

The spacing members 3 dene av cavity betweentheflowersurface of the top plate 2 and the upper surface of the runner I. This cavity serves for the reception of a block or a plurality of blocks 5, which, as best seen in Fig. 5, are

made hollow or trough-shaped for saving weight;

an-d are provided with flanges 6 at their upper sides which project as far as the inner surfaces of the spacers 3. With its lower surface the block- 5 extends into an aperture in the central portion lof the runner I in which it makesa ,tight fit. Fig. 5shows the block in its retracted position in which its lower surface is flush with the concave central portion of the runner l.

The mechanism for reciprocating the block,or blocks, 5'cornprises a pair of slides 'l which are placed on the top of therunner at both sides of the aperture in which the block 5 is mounted to reciprocate. Wedges 8 are placed on the slides and engage below the flanges 6 of thek block 5. When a pair of wedges 8 engages below theflanges 6 of the block 5 the block is retractedinto the position in which its lower surface is ilush with the lower surface of the central portion of the runner I, as shown in Figs. 1 and 5.l Arranged between each pair of retracting Wedges.

8 is a block-advancing wedge 9 which connects the two slides 1 in the manner of'a bridge, as best seen in Fig. 3.

At the central portion of the ski a supportingl rplate I0 of U-shaped section is placed on the top plate 2, Fig. 7, and held by a pair of angular strips 24, Whose inner edges are recessed to en-V gage over corresponding flanges at the sides of the supporting plate I0. Rivets 25, which extend from the lower surface of the skids at the sides of the runner I as far as the top of the strips 24, hold the strips onthe top plate. The top plate I0 supports a guiding plate II, which is placed on top of the strips 24, and the outer or long rivets' 25 at this portion of the ski are eX- tended beyondthe strips 24 forv the thickness of the guiding plate II. 'I'he top plate 2, the

supporting plate I0, and the guiding plate I I are connected by inner or short rivets 26Fig. The guiding plate II is slotted at I 2, andcor"' responding slots are made `in thel supporting plate I 0 and the top plate 2 for the reception of a pin 21, whose lower end is threaded and inserted in a bridge member I3 connecting the slides 1. erably slightly dished so that its elastic reaction exerts pressure and friction against the 'guiding ner I, the top plate 2 which, as described, is somee whatshorter than the ski, the supporting platev I0 which is againshorter than the top plate, and

` the guiding plate II whichis shortest ofl` all.

`In order to? permit of deflection of the ski'the i parts which -are above Athe runner are preferably made with lateral'flanges or divided altogether 1 likethe slides 1 which areY connected only by the advancingwedge 9 and the bridge member I3,

1 Fig. 3. The central portions of 'the'top plate. 2, l the-supportingplate I9, yand the guiding plate I I are connected bythe short rivets 26. l rivets25', as shown in Fig. 4, extendY onlyfor a portion of the length of the guiding plate I I. Toward the ends of the guiding plate II the long outer rivets-25 vare replaced .by inner short rivets y i 26, Fig. 6,A which connect only the supporting 1 plate Iand the guiding plate I`I. The side portions ofthe supportingplate I0 are in'this manner connected to the top plate 2 and'to theguid- 1 ing plate -II onlyfor a comparatively short distance and beyond the side portions are'only conl nected tothe guiding plate II bythe short rivets I 26.5 Bythese means, in the regionof the section' The 'long CII provided only with a runner I with its concave central portion, the spacers 3, and the top plate 2 which dene a cavity in the ski. The blocks 5, two of which are shown in Fig. 9, are made hollow or trough-shaped for the purpose specified and slide with a tight t in apertures in the central portion of the runner I'. Fig. 10' shows one of the blocks in its active position, and the top plate' 2 is recessed for the reception of the upper end of the retracted block. In this construction, the front ends of the blocks, that is,

' those ends which lead in the direction of running,

The pin has a flange 28 whicl'rgispref-V 8'-8, Fig.- 8,- the supporting plate I0 is rigidly l lconnected to the top: plate 2 and the guiding plate I'I, so Vthat relative longitudinal movement i of the members doesnot occur, while in-the region Yof the section C-C, Fig. 6the tcp plate 2' on the one hand and thesupporting and guiding plates I0- and II onv the other hand can perform small relativemovement, which greatly increases the'elasticity of theA ski.

'Preferably the several parts of the ski, includingfthe block vor blocks v5, are made ofv artificial l resin with or without insertions of fabric.

In operation the block, or blocks, 5, is normally'held'l in the retracted position, illustrated ,inl Figs; 1 and 5, by the ,two wedges 8; when it is desired; to move Ythe block, or blocks, 5 into theV active position, the pin 21 is pushed in forward direction' by its handle 29; This moves the slides `1fto the Vleft in Fig: 1, so that the wedges 8 arev `withdrawn' from below the anges 610i? the block 5, and the wedge 9 now engages the angesfrom above andA moves the blockV 5 into its active position, as. shown in Figs. 2', 3 and 6.

Referring now to,Figs. 9, 10, and 11, the ski is are pointed. Bly the mechanism which will be described the blocks can be placed in any intermediate kposition between their nal active and retracted positions. When it is desired to assist the track-keeping action of the skids at the sides of the Vrunner I, the blocks 5 are partly advanced and form pointed ridges at the centre of the ski. The resistance of the blocks is practically nil`on account of their pointed front ends.

Pinions 3l on shafts 32 engage in racks 4I] in the sides of the blocks 5 and are mounted to rotate in bearings spacing members 3. Rotation is imparted to the shafts 32 bythe gearing illustrated in Fig. 11V. Racks 40`and v4I are mounted to slide below the top plate 2, as shown for the rack 4I in Fig. 11, and teeth in the lower face ofk each rack mesh, respectively, with central pinions 3io on the shafts 32. The pinion 35 at Ythe lower end of a vertical shaft 36 meshes with a row of teeth 38 at the inner side of the' rack t0, and a similar row of teeth 39 at the inner'sideof the rack 4I. The shaft 36 is mounted v'to rotate in the top plate 2 and is' provided with a knurled handle 31 for turning it. VWhen the handle is turned'clockwise, as indicated bythe arrow in Fig. 9, the two racks 4IJ'andy 4I are moved inwardly. This causes the shafts 32 to be rotated in opposite directions, and the blocks 5 to be movedinto their active position,'as shown in Fig. 10. Rotation 'of the handle 31 in the opposite direction causes retraction of the blocks into their inactive position. It will Vappear that any intermediate position bletween the nal'retracted and nal active posi-k tions can be given to the blocks so that they can be made to assist to a greater or lesser eX- tent in the keeping vof the track by the skids at the sides of the runner I. The rear ends of the blocks are square and so prevent slipping t-in such aperture and completely closing the aperture at all times, and manually operated means for extending and retractingY the block withfrespect to the aperture.

2.' In a ski, a body having a transverse aperture in 4the lower surface thereof, anti-slip means comprising a block mounted to slide vertically on Vthe transverse aperture in the lower surface of the ski, and making a tight t in and completely fillingY such aperture atxall times, and.Y

manually operated means for vertically recipro- 33' inserted between the eating the block in its aperture, said block being so proportioned that the lower surface of the block is flush with the lower surface of the ski in its retracted position.

3. In a ski, anti-slip means comprising a block mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight fit in such aperture, and manual means arranged to be shifted in the longitudinal direction of the ski for vertically reciprocating the block in its aperture.

4. In a ski, anti-slip means comprising a block mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight fit in such aperture, a pair of flanges at the sides of the block, a pair of wedges arranged to engage alternately the upper and the lower surface of each flange, and manual means for shifting the wedges in Ithe longitudinal direction of the ski.

5. In a ski, anti-slip means comprising a block mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight fit in such aperture, a pair of flanges at the sides of the blo'ck, a slide arranged at one side of each flange, wedges on each slide arranged to engage alternately the upper and the lower surface of each flange, a bridge member secured to both slides, and manual means operatively connected to the bridge member for shifting the slides in the longitudinal direction of the ski.

6. In a ski, anti-slip means comprising a block whose forward end is pointed and which is mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight t in such aperture, and manual means for reciprocating the block in its aperture.

7. In a ski, anti-slip means comprising a plurality of blocks each mounted to slide vertically in transverse apertures in the lower surface of the ski, and making ai tight fit in and completely filling such apertures at all times, and manually operated means for reciprocating the blocks in their apertures in unison.

8. In a ski, anti-slip means comprising a plurality o-f blocks each mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight t in such apertures, and a rackand pinion-mechanism for reciprocating the blocks in unison, and manual means for operating the mechanism.

9. In a ski, anti-slip means comprising a plurality of blocks each mounted to slide in an aperture in the ski transversely to the lower surface of the ski, and making a tight t in such apertures, a rack on opposite sides` of each block, shafts arranged at opposite sides of each block, a pinion on each shaft which meshes. with the corresponding rack of the block, a lcentral portion on each shaft, a rack meshing with each central portion, and manual means including a rackand pinion gearing for shifting the ra'cks meshing with the central por-tions in opposite directions.

10. In a ski, a runner comprising a concave central portion, skids projecting along the sides of the centr-a1 portion and curved portions connecting the central portion and the skids, antislip means comprising a block mounted to slide in an aperture in the runner, transversely to its central portion and making a tight lit in such aperture, and manual means for reciprocating the block in its aperture.

11. In a ski, a body composed of a plurality of superposed and spaced layers arranged and secured with respect to each other soi that portions of the layers yare free for performing a slight relative lateral movement only, said layers dening a cavity in the body of the ski which opens in the form of a transverse aperture in the lowermost layer, anti-slip means comprising a block mounted in the cavity adapted to slide through the aperture in the ski transversely to the lower surface of the ski and making a tight flt in the aperture, and means for reciprocating the block vertically in the cavity and through the aperture.

12. In a ski as claimed in :claim 11, in which a handle is arranged in the uppermost layer of the ski and is operably connected with the block reciprocating means for operating the latter.

13. In a ski, a body composed of a plurality of layers arranged in superposed spaced relation with respect to each other, means connecting the medial portions of the layers directly tovgether, means connecting the end portions of certain layers to adjacent layers so that a relative slight movement only is permitted therebetween, said layers defining a cavity in the body of the ski which opens as a transverse aperture in the lower surface of the ski, anti-slip means comprising a block mounted to slide vertically in the cavity and projected at times through the aperture transversely of the lower surface of the ski and making a tight t in such aperture, means situated between the spaced layers for reciprocating the block, and means on the uppermost layer for operating the block reciprocating means.

ERICH MIESEN. 

